Carrier 38QUS014DS2-2 Service Manual page 42

Forced cooling mode:
The compressor runs at F2 frequency and indoor fan runs as breeze. After running for 30 minutes. the
machine will turn to auto mode as 24℃ setting temperature.
Forced auto mode:
The action of forced auto mode is the same as normal auto mode with 24℃ setting temperature.
8.4.6.4 When there's indoor unit running in forced cooling, it is the master forced cooling unit. Other indoor
units will run at forced cooling mode too and they will be the slave forced cooling units. The slave forced
cooling units can not quit forced cooling mode until the master forced cooling unit quit, and turn to cooling
mode at low speed with 24℃ setting temperature.
7.4.6.5 The slave forced cooling units will not be controlled by other signals.
8.4.7 Timer Function
8.4.7.1 Timing range is 24 hours.
8.4.7.2 Timer on. The machine will turn on automatically when reaching the setting time.
8.4.7.3 Timer off. The machine will turn off automatically when reaching the setting time.
8.4.7.4 Timer on/off. The machine will turn on automatically when reaching the setting "on" time, and then
turn off automatically when reaching the setting "off" time.
8.4.7.5 Timer off/on. The machine will turn off automatically when reaching the setting "off" time, and then
turn on automatically when reaching the setting "on" time.
8.4.7.6 The timer function will not change the AC current operation mode. Suppose AC is off now, it will not
start up firstly after setting the "timer off" function. And when reaching the setting time, the timer LED will be
off and the AC running mode has not been changed.
8.4.7.7 The setting time is relative time.
8.4.8 Sleep mode
8.4.8.1 The sleep function is available in cooling, heating or auto mode.
8.4.8.2. Operation process in sleep mode is as follow.
After pressing ECONOMIC or SLEEP button on controller, the machine will turn into sleep mode.
When cooling, The set temperature rise 1℃ per hour(be lower than 30℃). Two hours later, the set
temperature will maintain as a constant and the fan speed is kept at low speed.
When heating, The set temperature decrease 1℃ per hour(be higher than 17℃). Two hours later, the set
temperature will maintain as a constant and the fan speed is kept at low speed (Anti-cold function takes
precedence over all).
When auto, After an hour running under economic mode ,if it is under cooling mode the set temp will rise 1℃,
if it is under heating mode the set temp will decrease 1℃, if it is under fan-only mode the set temp will be
changeless; the condition will be the same after the air conditioner running under economic mode after 2
hours, and during the next time the set temp do not change.
8.4.8.3 Operation time in sleep mode is 7 hours. After 7 hours the AC quits this mode and the AC will turn off.
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